Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Optimization of 18650 Cells Arrangement in a Commercial Lithium-ion Battery Pack with an Air-cooling Thermal Management System

Authors
Alireza Shamikhi 1
Masoud Aryanpour 2
1 M.Sc. student, Department of Mechanical Engineering, Sharif University of Technology
2 Assistant Professor, Department of Mechanical Engineering, Sharif University of Technology
10.30506/ijmep.2023.537291.1817
Abstract
In this paper, we optimize the arrangement of cells in a Lithium-ion battery pack using an air-cooling thermal management system under operating conditions in transportation applications. The thermal and electrochemical behavior of battery cells is modeled using the quasi-two-dimensional approach by Newman’s method. The effects of inter-cellular distance on the maximum temperature, and on the temperature distribution in the pack as the target variables are thoroughly investigated. A suitable range for the above distances are then determined in order to reduce the overall cooling power and the expected thermal performance of the pack. According to this study, by reducing the distance between the batteries, the temperature of the cells decreases. However, this reduction in the distance also reduces the battery pack's temperature uniformity and cooling efficiency. The results of the temperature distribution are investigated, analyzed, and discussed. Finally, by examining the effect of the number of pack cells on the cooling efficiency, it is shown that increasing the number of cells initially increases the cooling efficiency; however, after a certain limit, it leads to a decrease in the cooling efficiency.
Keywords
Lithium-ion batteries
Battery Management System
Air-cooling
Optimization
Newman’s model

Subjects

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  • Receive Date 22 August 2021
  • Revise Date 12 April 2022
  • Accept Date 11 April 2023